[Bug 2067131] [NEW] Upgrading hangs when NFS mounts are present

[Julian Edwards]

Public bug reported:

When upgrading to 24.04 today, the process stalled when it got to os-
prober checks for other installed OSes.

As far as I can determine, this was because the network connection was
completely destroyed during upgrade leaving the machine without
connectivity, and when os-prober runs it erroneously attempts to look
inside NFS mounts. Since there is no connectivity, it will apparently
stall forever on this while the kernel logs a lot of errors to syslog.

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: ubuntu-release-upgrader-core 1:24.04.18
ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
Uname: Linux 6.8.0-31-generic x86_64
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Sat May 25 16:31:34 2024
InstallationDate: Installed on 2019-07-04 (1787 days ago)
InstallationMedia: Kubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: Upgraded to noble on 2024-05-25 (0 days ago)
VarLogDistupgradeXorgFixuplog:
 INFO:root:/usr/bin/do-release-upgrade running
 INFO:root:No xorg.conf, exiting

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade noble

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https://bugs.launchpad.net/bugs/2067131

Title:
  Upgrading hangs when NFS mounts are present

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  When upgrading to 24.04 today, the process stalled when it got to os-
  prober checks for other installed OSes.

  As far as I can determine, this was because the network connection was
  completely destroyed during upgrade leaving the machine without
  connectivity, and when os-prober runs it erroneously attempts to look
  inside NFS mounts. Since there is no connectivity, it will apparently
  stall forever on this while the kernel logs a lot of errors to syslog.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: ubuntu-release-upgrader-core 1:24.04.18
  ProcVersionSignature: Ubuntu 6.8.0-31.31-generic 6.8.1
  Uname: Linux 6.8.0-31-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Sat May 25 16:31:34 2024
  InstallationDate: Installed on 2019-07-04 (1787 days ago)
  InstallationMedia: Kubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to noble on 2024-05-25 (0 days ago)
  VarLogDistupgradeXorgFixuplog:
   INFO:root:/usr/bin/do-release-upgrade running
   INFO:root:No xorg.conf, exiting

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